20th Century Boys (Korean title: 20세기 소년) by Naoki Urasawa has been read or recommended by 2 Korean celebrities, including Bong Joon-ho, BIBI. Below, each entry shows where they mentioned it and what they said.
BIBI brought this manga along as a recent favorite: owns every volume, won't ever part with them, and wants to be buried with them. (Source: Naver Entertainment)